JPH0683807B2 - Coating and drying equipment for plate-shaped workpieces - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a coating and drying apparatus for plate-like workpieces that can efficiently coat and dry workpieces over many items by a series of operations.

[Conventional technology]

For example, in a building, not only the inner wall but also the outer wall is being formed using a plate-shaped body. For example, a plate-like body that forms such an outer wall, that is, an exterior plate is often coated in order to enhance the appearance and durability of a building. Further, since the plate-like body used in a building is used in a large amount, it is important that it can be produced efficiently and inexpensively and that the quality is stable.

However, since such a plate-like body is generally formed over a wide variety of products having different sizes, surface shapes, etc., its coating has conventionally been performed by a so-called badge system in which one process is performed for each lot. Further, for coating, organic and inorganic coating agents are used properly, but conventionally, different drying devices have been used depending on the coating agents.

[Problems to be Solved by the Invention]

However, in the conventional badge system as described above, the production efficiency is inferior and the quality of each production lot tends to vary. Further, the one using different drying devices for the organic coating and the inorganic coating is lacking in versatility.

The present invention can efficiently coat various types of plate-like works by a series of work lines, stabilizes the quality by increasing productivity, and further, after coating, by heating and drying while ventilating, An object of the present invention is to provide a coating / drying apparatus for a work which can solve the above problems by making it possible to dry both an organic coating material and an inorganic coating material.

[Means for Solving the Problems]

The present invention relates to a stock table that stores stacked plate-shaped works, a transfer device that sequentially takes out the works stored on the stock table, and a work that is picked up by the transfer device. A first conveyor, a first coater using an applicator for transferring the work carried in by the first conveyor, and spray-painting the transferred work; and a first coater. A first drying device that receives and transfers a spray-coated work and heats and dries by far-infrared rays while ventilating, and receives and transfers a work that has been heated and dried by the first drying device. A first cooling device that cools while cooling, a second transport conveyor that transports the work cooled by the first cooling device, and a color transport while transporting the work transported by the second transport conveyor. A second coating device using a roll coater, a third conveyor that conveys a work coated by the second coating device, and a work that is carried in by the third conveyor, A second drying device that heats and dries with far infrared rays while ventilating, a second cooling device that cools the work that has been heated and dried by the second drying device while receiving and transferring the work, and a second cooling device. A fourth conveyor that conveys the work cooled by the device, a third coating device that clear-paints while conveying the work that is conveyed in by the fourth conveyor, and a third coating device that coats the work. A third drying device for receiving and transferring the dried work, warming and drying it with far-infrared rays while ventilating, and a fifth transfer device for transporting the work dried by the third drying device. The conveyor includes a conveyor and a stacking device for stacking the works conveyed by the fifth conveyer, and the third conveyer conveys a plurality of pieces and is separated from each other by a distance smaller than a length of the work in the conveying direction. A base frame having an arm that traverses the third transfer conveyor and is pivotally supported at one of its side edges, and this arm from the horizontal position where the upper surface is lower than the transfer surface of the third transfer conveyor. A plate-like work, which comprises a tilting device for lifting the work on the conveyor and tilting the one side edge to a tilted position which is tilted downward, and which is used for inspecting the finished state of color coating. This is a paint drying device.

[Operation] In the device of the present invention, the work stacked on the stock table by the transfer device is taken out to the first transfer conveyor, and the work carried in by the first transfer conveyor is undercoated by the first coating device. I do. In the first coating apparatus, by using an applicator for performing spray coating, it is possible to efficiently form a coating film even on a concave portion of a work having an uneven portion on the surface such as a tile pattern, a brick pattern, or a spot pattern. Further, the work carried out from the first coating device is carried into the first drying device. The first drying device dries while transferring the work. In addition, since far-infrared rays generated by heating with hot air are used for drying while ventilating, drying work can be performed safely and efficiently even in coating agents using organic and inorganic solvents. The work dried by the first drying device is carried into the first cooling device, the temperature of the work is lowered, and the work is transferred to the second coating device through the second conveyor. The second coating device uses a roll coater,
Roller coating can be applied to the work surface efficiently. Further, the work is carried into the second dryer by way of the third conveyor. Also in the second drying device, as in the case of the first drying device, far infrared rays are used for ventilation while drying.
The dried work is carried into the third coating device through the second cooling device and the fourth conveyor. The third coating device uses an applicator that applies a spraying device, and performs so-called clear coating to increase the durability of the surface of the work and smooth the surface to prevent adhesion of dust and the like. Further, the work is carried into the third drying device. Similarly to the first and second drying devices, the third drying device also dries while ventilating, and therefore safely when using an organic solvent. Further, the dried work is transferred to the loading device through the fifth transfer conveyor and loaded, whereby the coating and drying process of the work can be completed.

Further, by providing a preheating device between the first conveyor and the first coating device, the surface of the work can be dried, and the antiseptic effect and the coating accuracy can be improved. Since the third conveyor is provided with a tilting device for tilting the work, the finished state of the color coating applied by the second coating device can be appropriately inspected, and the coating quality can be improved.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

In FIG. 1, the device 1 of the present invention comprises a stock table 2 and
Transfer device 3, first transport conveyor 4, first coating device 5, first drying device 7, first cooling device 8, second transport conveyor 9, and second coating device Apparatus and 10, third transfer conveyor 11, second drying apparatus 12, second cooling apparatus 6, fourth transfer conveyor 13, and third coating apparatus 14
A third drying device 15, a fifth conveyor 16 and a loading device 17, and a third conveyor 11;
A tilting device 18, 19 is provided on the fourth transfer conveyor 13, and a cooling device 20 is provided between the fifth transfer conveyor 16 and the downstream side of the third drying device 15. Further, the third transfer conveyor 11 is provided with one direction changing device 23 for returning the work W at a right angle to transfer the work W, and the fourth transfer conveyor 13 is provided with two direction changing devices 21, 22.

Note that FIG. 2 shows an outline of the processing performed on the work W by the apparatus 1. The work W is first coated with the undercoat by the first coating apparatus 5 and then subjected to the first drying. It is dried by the device 7 and cooled by the first cooling device 8. After cooling, color coating is applied by the second coating device 10 and then dried by the second drying device 12. After further cooling by the second cooling device 6, clear coating is applied by the third coating device 14 and drying by the third drying device 15, and in this example, the cooling device.
Cooled with 20. In FIG. 2, the numbers in parentheses () indicate the devices that perform each process.

As shown in FIG. 3, the stock base 2 is, in this example,
A so-called table lifter including an upper plate 31 that can be raised and lowered, and a roller conveyor 32 is provided on the upper surface thereof.
Further, in this example, a plurality of stock stands 2 ... Are arranged side by side.

As a result, the works W stacked on the pallet P are stored and the height of the uppermost work W can be made constant by raising and lowering the upper plate 31.

As shown in FIGS. 3 and 4, the transfer device 3 is a dolly that uses a cylinder to move a rail 37 at the upper end of a frame 36 that straddles the stock table 2 ... And the first conveyor 4. The lifting frame 38 is attached to the
A plurality of adsorbers 39 ... Are arranged downward in the
The work W stored on the stock table 2 can be sequentially taken out from the top by the 39, and can be transferred onto the first transfer conveyor 4.

For convenience of transfer, the work W can be sequentially transferred into the frame 36 together with the pallet P by the roller conveyor 32 of the stock table 2, and the pallet P can be transferred between the stock table 2 and the first transfer conveyor 4. The pallet is carried out using a carry-out conveyor 40 for carrying out the pallet.

Further, in the suction device 39, a support shaft 41 provided on the upper surface thereof is attached to a horizontal piece 42 formed on the elevating frame 38 so as not to come off and to be vertically movable, and a spring 43 is provided between the suction piece 39 and the horizontal piece 42. Intervene. Therefore, as the elevating frame 38 descends, the horizontal piece 42 presses the suction device 39 against the work W via the spring 43. As a result, the shock acting on the work W is absorbed and the spring
43 allows the pad 39A to enter the concave portion Q and be surely adsorbed to the concave portion Q even when an uneven portion or the like exists on the surface of the work W. The pressing amount is detected by the detector 44. 45 in the figure
Is a connection fitting that leads to a vacuum device.

The first transfer conveyor 4 is composed of a roller conveyor, and carries the work W transferred by the transfer device 3 into the first coating device 5.

The first coating device 5 has a box body as shown in FIGS.
95, a transfer device 99 for transporting the work W through the inlet 96 and the outlet 97, and an applicator 101 using a spray gun 100 for spray coating. The transfer device 99 is a chain conveyor using multiple chains, and uses two chain conveyors 103, 104 divided in the transport direction to form a discontinuity 102 inside the box 95. The chain conveyors 103 and 104 have chain 98 wound between the chain wheels 105 and 106 arranged with the discontinuity 102 separated, and the chain wheels 107 and 108 arranged outside the inlet 96 and outside the outlet 97, respectively. There is.
The spray gun 100 is disposed above the discontinuity 102, and the discontinuity 102 has a tray 105 between the chain conveyors 103 and 104.
Is provided.

As shown in detail in FIG. 7, the chain 98 is provided with an overhanging piece 111 projecting outward on one side surface of the chain, and the overhanging piece 111 has a button-shaped swelling portion 1 having a spherical upper surface at the upper end.
A supporting piece 113 having 12 is raised, and the bulging portion 112 supports the work W. Further, the chain 98 is provided with a cover 116 having a standing piece 114 that covers the other side surface and a horizontal piece 115 that is formed at the upper end of the chain and extends in the direction across the chain. The cover 116 is connected to the entrances 9 from the chain wheels 105 and 106, respectively.
6. A cover 11 that extends to the inner surface of the outlet 97 and covers not only the bosses of the chain wheels 105 and 106 but also the rotating shaft that supports the chain wheels 105 and 106.
It is fixed to 8 to prevent the paint from adhering to the chain 98 by painting.

The spray gun 100 of the applicator 101 is, for example, an airless spray gun and can spray the coating agent densely. Further, the applicator 101 is attached to an appropriate reciprocator 119 that reciprocates in a direction traversing the transfer device 99, so that the applicator 101 can reciprocate and, at the same time, form a uniform undercoat film on the surface of the work W having an uneven portion.

As the spray gun 100, an air spray gun can be preferably used, and as the undercoating coating material, which has anticorrosive property, filling effect, etc., a coloring coating for color coating by the second coating device 10 thereafter can be used. Those having an affinity effect to enhance the adhesiveness of the agent, further the same as the coloring coating agent,
Alternatively, various organic or inorganic coating agents such as those having different colors are used. In this example, the work W carried into the first coating device 5 is previously heated and dried between the first transport conveyor 4 and the first coating device 5, so that the work W is dried.
A preheating device 35 including a preheating lamp L for improving corrosion prevention and coating accuracy is arranged.

The work W that has been undercoated is dried by the first drying device 7.

As shown in FIG. 8, the first drying device 7 has a vertically long box body.
A transfer device 74 is provided for transferring the work W through entrances 72 and 73 that are cut out in front and rear of 71.

Further, the box 71 is provided with a hot air passage 77 for circulating hot air generated by the burner 76 and a ventilation passage 80 for ventilating with a fan 79.

In the present example, the burner 76 is also installed in the sub box body 81 protruding from the box body 71. Further, the burner 76 is provided with a guide cylinder 82 for guiding the flame, and a duct 83 surrounding the guide cylinder 82 communicates with a folded portion 85 provided along the transfer device 74 in the box body 71, Further, the outlet of the folded portion 85 is provided with a fan 88 arranged at an opening of a folded portion 87 provided in a part of the duct 83.
Thus, the flow can be returned from the rear end communication portion 89 of the duct 83 into the duct 83. The hot air passages 77 are provided above and below the transfer device 74, and a far-infrared plate 90 that generates far infrared rays by heating is provided on the surface of the folded portion 85 facing the transfer device 74.

As a result, the hot air from the burner 76 is directed to the duct 84 and the turnback portion 85.
The work W can be heated and dried by the far infrared rays circulated through the infrared rays and generated from the far infrared ray plate 90. A space is provided between the far-infrared plate 90 and the work W, and the ventilation path 80 is heated and dried from the exhaust port 91 on the outlet side by, for example, air supply from the fan 79 provided on the inlet side. The accompanying solvent can be exhausted by ventilation.

The first drying device 7 is provided with an appropriate sensor S, and the burner amount of the burner 76 and the hot air circulation amount are controlled by the control device 93, so that the plate surface temperature of the work W is 40 to 200 ° C.
It can be controlled within a range. Further, by controlling the speed of the transfer device 74, the staying time of the work W staying in the furnace can be adjusted to 3 to 30 minutes, and by adjusting in such a wide range,
The work W coated with various coating materials can be dried by heating. Further, by providing the ventilation passage 80, the evaporated solvent can be immediately discharged, and it can be used for drying the work W to which the coating material is applied regardless of whether it is inorganic or organic.

The dried work W is cooled by the first cooling device 8, and the cooling device 8 is cooled while being transferred by using an appropriate fan F or the like, and the cooled work W is subjected to the second conveyance. The work W is transferred to the conveyor 9, and the work conveyor W carries out the work W to the second coating apparatus 10.

The second coating device 10 is provided with a straightening device 47 on the upstream side of a so-called roll coater 46, as schematically shown in FIG. The roll coater 46 supplies the coating material to the coating roller 52 through the feed roller 50 and the intermediate roller 51 immersed in the coating material pool 49 that stores the supplied coating material.
By passing between 52 and the receiving roller 53 therebelow, color coating is applied to the upper surface thereof. Moreover, the correction device 47 is
It is composed of a lower roller 54 having tapered portions at both ends, and an upper roller having a pressing ring 56 which can be pushed down by a cylinder and is located above the tapered portion. The straightening device 47 corrects the warp WA, which tends to occur at both ends of the work W, shown in the left side in FIG. 9, by pushing down the pressing ring 56 and feeding it to the roll coater 46, thereby ensuring accuracy. Good painting is possible. Also, this roll coater 46
Apply a colored organic or inorganic coating agent. The straightening device 47 includes a detector for detecting the work W before and after the upper roller.
57 can be moved freely.

Further, the work W is carried out by using the third conveyor 11.

The third conveyor 11 comprises a roller conveyor and is provided with a tilting device 18.

As shown in FIGS. 10 and 11, the tilting device 18 notches the support frames 62, 62 on both sides for receiving the rollers 61 of the conveyor 11 at intervals smaller than the length of the work W and at the notches. The arms 63, 63, which are located on the outer side of one of the support frames 62 and have one end pivotally supported, can be inserted and retracted. The arm 63 forms a planar U-shaped base frame by connecting the other ends with a joint plate 64, and the joint plate 64 has a cylinder-shaped driver.
By attaching 65, it can be flipped up by its extension as shown in FIG. In the inverted state, the upper surface of the arm 63 is arranged at a horizontal position lower than the transfer surface of the third transfer conveyor 11, so that the work W can freely pass therethrough. Also, if detected by the detection device 66 and if necessary,
The work W is selected and lifted from the horizontal position by stopping the electric motor 67 for driving the roller 61 and extending the driver 65, and the tilt position of the arm 63 tilted with one side edge downward. It can be tilted up to the top (shown by the one-dot chain line in Fig. 11), and the finished state of color coating is inspected as appropriate. Further, when the arm 63 is in the flipped-up state at the tilted position, a gap for passing the work W can be formed between the lower surface of the arm 63 and the transfer surface, so that the work W can be freely transferred during the inspection. The rollers 61 can rotate in unison with each other by engaging a chain wheel 69 provided at one end thereof with a chain 70 that is orbited by the electric motor 67.

The direction changing device 23 includes a vertical moving part connected to the roller conveyor and a traverse part using a chain. The roller conveyor of the vertically moving part is formed so as to be able to move up and down, and the work W can be transferred to the traverse part by being lowered, and the work W transferred by the third transport conveyor 11 can be transferred to the second dryer 12.
Bring to.

The second drying device 12 has substantially the same configuration as that of the first drying device 7, and heats and dries the color-coated work W with far infrared rays while ventilating the work W. The second cooling device 6 having substantially the same structure as that of the first cooling device 8 is further conveyed to the third coating device 14 by using the fourth conveying conveyor 13.

The fourth conveyor 13 includes the direction changing devices 21 and 22 having the same structure as the direction changing device 23. Therefore, the work W is folded back into a U shape and conveyed, and the vertical movement portion includes the tilting device 18 and the tilting device 18. The tilting device 19 having the same configuration is interposed.

The third coating device 14 has substantially the same configuration as the first coating device 5, and the durability is improved by uniformly spraying a clear coating agent on the work W to coat the color-coated surface. It also increases dirt and prevents dirt.

The work W coated by the third coating device 14 is dried by the third drying device 15 having substantially the same structure as the first drying device 7 and passes through the cooling device 20 to the fifth transfer conveyor.
After being taken out onto the top 16, it is carried out by the loading device 17. The loading device 17 has substantially the same configuration as the transfer device 3,
Further, the work W can be stacked on the pallet P carried in by the pallet carrying-in device 24 by operating in reverse to the transfer device 3. In this way, the device 1 can be painted, dried and loaded by a series of lines.

In the apparatus 1, the dimensions of each conveyor and the apparatus are set so that the work W having the desired maximum size can be coated and dried, and when the work W1 having a smaller size than that is coated and dried, for example, As shown in FIG. 12, it is preferable to use a mounting jig 120 made of a so-called punching board or the like in which a large number of holes are evenly provided so that small-sized workpieces W1 ... . The mounting jig 120
As the upper and lower surface temperatures of the works W1 ... In the drying furnace and thereafter become substantially equal, it is possible to form the work W1 ... It is preferable in terms of preventing unevenness in drying.

〔The invention's effect〕

The plate-type work coating / drying apparatus of the present invention is configured as described above, so that it is possible to apply a coating to the plate-shaped work by a series of operations, which helps stabilize quality and improve productivity, It also reduces costs. Further, since the first coating device performs the undercoat coating and the second coating device performs the color coating, a high degree of protection and beauty effect can be obtained even on a work having an uneven surface, and the undercoat coating and the color coating can be performed. When the colors are changed, it is possible to perform coating with various changes in accordance with various requirements, such as the color arrangement of the concave portions and the convex portions can be different, and the versatility can be improved. Further, since the clear coating is performed by the third coating device, it is possible to produce a work that improves appearance and at the same time enhances durability and prevents stains. Moreover, since the first, second, and third drying devices perform drying using far infrared rays and while ventilating, safe work can be performed even when an organic solvent is used. Therefore, an inorganic or organic coating agent can be applied. It can be used regardless. Further, since the first and second cooling devices are arranged on the downstream side of the first and second drying devices, the second and third coatings can be performed in series at an early stage, and the coating work can be performed. Can be streamlined. Further, a tilting device including a base frame having an arm that traverses the third transfer conveyor and a driver for tilting the arm is provided on the third transfer conveyor that transfers the color-painted work by the second coating device. Therefore, the finished state of color coating can be easily inspected, which helps improve the coating quality.

If a preheater is provided, the surface of the work can be heated and dried prior to painting, and it prevents corrosion of the work due to humidity and uneven coating, discoloration of the coating, and deterioration of coating accuracy such as peeling of the coating. , Can produce higher quality and uniform coated products.

[Brief description of drawings]

FIG. 1 is a plan view showing an embodiment of the apparatus of the present invention, FIG. 2 is a perspective view schematically showing the steps of coating and drying by the apparatus, and FIG. 3 exemplifies a stock table and a transfer apparatus. Front view,
FIG. 4 is a perspective view illustrating an adsorber used in a transfer device, FIGS. 5 to 6 are sectional views showing a first coating device, and FIG.
FIG. 8 is an enlarged perspective view showing a part of a transfer device used in the coating device, FIG. 8 is a cross-sectional view illustrating the first drying device, and FIG. 9 is a perspective view illustrating the second coating device. FIG. 10 is a perspective view illustrating a tilting device, FIG. 11 is a front view showing its action, and FIG. 12 is a perspective view illustrating a mounting jig. 2 ... stock stand, 3 ... transfer device, 4 ... first conveyor, 5 ... first coating device, 6 ... second cooling device, 7 ... first drying device, 8 ... first cooling device , 9 ... second conveyor, 10 ... second coating apparatus, 11 ... third conveyor, 12 ... second drying apparatus, 13 ... fourth conveyor, 14 ... third coating apparatus, 15 ... third drying device, 16 ... fifth conveyor, 17 ... loading device, 18 ... tilting device, 21,22,23 ... direction changing device, 35 ... preheating device, 39 ... adsorber, 46 ... roll coater, 63 ... Arm, 65 ... Driver, 76 ... Burner, 77 ... Hot air passage, 80 ... Ventilation passage, 90 ... Far infrared plate, 100 ... Spray gun, 101 ... Applicator.

Claims (2)

[Claims] 1. A stock table (2) for storing stacked plate-like works (W), and a transfer device (3) for sequentially taking out the works (W) stored on the stock table (2) from above. , A first transfer conveyor (4) on which the work (W) taken out by the transfer device (3) is transferred, and a work (W) carried in by the first transfer conveyor (4) is transferred First coating apparatus (5) using an applicator (101) for spray-painting the transferred work (W) while
And a first drying device (7) for receiving and transferring the work (W) spray-coated by the first coating device (5) and heating and drying by far infrared rays and while ventilation while transferring. A first cooling device (8) that receives and transfers the work (W) that has been heated and dried by the first drying device (7) and cools it by the first cooling device (8). Work (W)
And a roll coater (4) for performing color coating while transferring the work (W) carried in by the second transfer conveyor (9).
Second coating device (10) using 6), and work (W) coated by the second coating device (10)
And a third transport conveyor (11) for transporting the second work, and a second drying for heating and drying the work (W) carried by the third transport conveyor (11) by far-infrared rays and during ventilation during transfer. A device (12), a second cooling device (6) for receiving and transferring the work (W) heated and dried by the second drying device (12), and cooling the work (W), and a second cooling device (6) ) Work cooled by (W)
And a third coating device (14) for carrying out clear coating while transferring the work (W) carried in by the fourth transportation conveyor (13), Work (W) painted by the painting device (14)
A third drying device (15) for receiving and transferring and heating and drying by far-infrared rays and ventilation while transferring
A fifth transfer conveyor (16) for transferring the work (W) dried by the third drying device (15), and a work (W) transferred by the fifth transfer conveyor (16). The third transfer conveyor (11) is provided with a stacking device (17) for stacking, and the third transfer conveyor (11) is separated from the third transfer conveyor by a distance smaller than the length of the plurality of works (W) in the transfer direction. A base frame having an arm (63) that crosses (11) and is pivotally supported at one side edge of the base frame, and this arm (63) has a transfer conveyor (11) whose upper surface is third.
From a horizontal position lower than the transfer surface of (3) and a driver (65) that lifts the workpiece (W) on the third transfer conveyor (11) and tilts the one side edge to a tilted position that is tilted downward. The coating and drying device for plate-like workpieces, which comprises a tilting device (18) used to inspect the finished state of color coating. 2. A preheating device (35) for drying a work (W) is provided between the first conveyor (4) and the first coating device (5). An apparatus for coating and drying a plate-like work as described.